20078447616 has 176 divisors, whose sum is σ = 59603399680. Its totient is φ = 6676992000.

The previous prime is 20078447593. The next prime is 20078447633. The reversal of 20078447616 is 61674487002.

20078447616 is a `hidden beast` number, since 20 + 0 + 7 + 8 + 4 + 4 + 7 + 616 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20763165 + ... + 20764131.

It is an arithmetic number, because the mean of its divisors is an integer number (338655680).

Almost surely, 2^20078447616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20078447616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29801699840).

20078447616 is an abundant number, since it is smaller than the sum of its proper divisors (39524952064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20078447616 is an equidigital number, since it uses as much as digits as its factorization.

20078447616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 20078447616 in words is "twenty billion, seventy-eight million, four hundred forty-seven thousand, six hundred sixteen".